Ballbase shuttle tip



March 29, 1949. PAvlA 2,465,920

BALLBASE SHUTTLE T'IP Filed May 10, 1947- VEN TOR.

Patented Mar. 29, 1949 UNITED STATES PATENT OFFICE.

BALLBASE SHUTTLE TIP Hector Pavia, AllentowmPa.

Application May 10, 1947, Serial No. 747,161

Claims. 01439 -496) My invention relates to an. improvement in shuttle tips and, more particularly, to a ballbase shuttle tip that has many advantages over the conventional tips presently in use.

My principal objective was to design a shuttle tip that would prevent any tearing of the filaments or thread as the shuttle moves through the warp. Today, in the weaving industry, due to the use of fine and delicate threads, it is necessary to have a shuttle tip construction that will maintain a smooth joint where the metal tip is aflixed to the wooden body of the shuttle. The conventional shuttle body, within a short period of time, becomes frayed and roughened at the point where the tip is afiixed to the shuttle body, requiring extensive maintenance to keep the surface of this joint smooth in order that it will not tear the threads of the warp.

Through the use of my improved shuttle tip, it is impossible for any rough edges to form thereby not only saving considerable time and labor in maintenance, but what is more important, extensive tests have shown that this new shuttle tip will stand up under any conditions and can be used indefinitely in the weaving of the most delicate type of cloth without injuring the warp threads.

Further advantages and unique features of my device will be apparent as I proceed with the description.

With reference to the drawings Fig. 1 shows a partial plan view of one end of a shuttle using my improved shuttle tip;

Fig, 2 shows a plan sectional view of the end of a shuttle showing my improved shuttle tip amxed to the shuttle body;

Fig. 3 shows a view similar to Fig. 2 showing a modification of my invention utilizing a square shuttle tip; and

Fig. 4 shows a conventional shuttle tip construction after use.

In Figs. 1 and 2 I show my ball base shuttle tip Ill afiixed to a conventional shuttle body I I which is normally made of wood or fibre, or a combination thereof. My improved shuttle tip l0 The baselz and the shank It is a slightly depressed circular area I! which is normally partially occupied by a fibre washer l8 that is positioned around the shank I4. The end portion IQ of theshuttlelbody H is rounded ofi at its edges so that when the tip I ll is aillxed to the body H even though the base I2 is flush against the end I9 a V-shaped area 2| is formed at the junction of the base tip I0 and the body H.

In normal operation, as the shuttle moves through the warp the thread or filler 22 which is wound on a bobbin 23 is directed around a tension pin 24 through an opening in the shuttle body I l and then over the inclined surface 25 of the shuttle body II and the shuttle tip l0. Due to the rounded edges 13 and 20, respectively, of the tip l0 and the shuttle body ll, there is no possibility of the thread 22 being caught and broken at this point, nor can the base l2 of the tip I I! catch on the warp thread as the shuttle moves forward and backward during the weaving operation. Therefore, the thread 22 will be guided over these rounded edges l3 and 20, respectively, resulting in a smooth weaving operation without any interruptions.

In Fig. 3 I show a modification of my conical tip I 0 having the same improvements, namely, the rounded edges of the base portion. The tip is known as a square tip which is utilized on some shuttles and which may also be constructed with rounded edges on its base.

In Fig. 4 I show the conventional shuttle tip affixed to the shuttle body H. In the conventional construction, the tip 40 is affixed to the shuttle body II with its base 4| flush against and abutting the end IQ of the shuttle I I. When the shuttle is new the juncture or abutting line between the metal tip 40 and the shuttle body II is smooth and even and in the beginning the thread 22 passes over this joint without any interruption. However, due to various conditions such as the excessive room temperature of the mills and the speed at which the shuttle is operated, the wood or fibre body of the shuttle contracts at the point where the tip is ailixed to the body. This causes the sharp base 4| of the tip 40 to extend above the inclined surface 25 of the shuttle body ll resulting in the thread 22 and the warp threads being caught and broken on this sharp base as the shuttle moves back and forth. In order to keep the breaks in the thread at a minimum, the shuttle tips are filed down from time to time to make a smooth joint once again with the shuttle body. This not only results in considerable maintenance work but ex- 3 cessive loss of time when the tip breaks the warp threads.

Due to my improved tip construction, the expansion and contraction of the end of the wooden shuttle take place where the end of the shuttle meets the base of the tip which is at the bottom of the V-shaped area 2|. By restricting the expansion of the end of the wooden shuttle in this area, the joint never becomes roughened or frayed which prevents the tip from tearing the warp and also eliminates expensive maintenance work.

While the invention has been described in detail with respect to a present preferred form which it may assume, it is not to be limited to such details and form since many changes and modifications may be made in the invention without departing from the spirit and scope of the invention in its broadest aspects. Hence, it is desired to cover any and all forms and modifications of the invention which may come within the language or scope of any one or more of the appended claims.

I claim:

1. A shuttle tip having a trailing peripheral edge rounded throughout for the purpose of eliminating thread breakage during a weaving operation.

2. A conical shaped shuttle tip having a circular trailing peripheral edge rounded throughout for the purpose of eliminating thread breakage during a weaving operation.

3. In a shuttle, a non-metallic body having a metal tip at each end, the edges of said body and tip being rounded at the juncture of the tip with the body for the purpose of eliminating thread breakage during a weaving operation.

4. In a shuttle, a body having a tip at each end, the edges of said body and tipbeing rounded at the juncture of the tip with the body.

5. In a shuttle, a non-metallic body having a conical shaped metal tip at each end, the edges of said body and tip being rounded at the juncture of the tip with the body for the purpose of eliminating breakage during a weaving operation.

HECTOR PAVIA,

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name v Date 553,302 Cruse Jan. 21, 1896 659,952 Baker et al Oct. 16, 1900 

